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MACHINE. FOR COVERING EL Q RIOAL OONDUGTING WIRES WITH METALLIG ARMOR.

No. 253,529. Patented Feb. 14,1882.

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V UNITED STATES PATENT OFFICE. I

WILLIAM HALKYARD, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR OF ONE- HALF TO HENRY 'A. CHURCH, OF SAME PLACE.

MACHINE FOR COVERING ELECTRICAL CONDUCTING-WIRES WITH METALLIC ARMOR.

SPECIFICATIQN forming part of Letters Patent No. 253,529, dated February 14, 1882.

Application filed July 2'2, 1881. (NomodoL) To all whom it may concern:

Be it known that I, WILLIAM HALKYARD, of the city and county of Providence, State of Rhode Island, have invented a new and useful 5 Improvement in Machines for Covering Electrical Conducting-Wires with Metallic Armor; andI hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

The invention consists in the novel combination of devices composing a machinefor covering a wire with a longitudinal strip or sheet of metal and securing the lapped edges of the covering-strip, as will be hereinafter particularly described, and pointed out in the claims. Figure 1 is a sectional view of an insulated cable protected by a sheet-metal armor, in which the edges of the metal overlap and are brazed together. Fig. 2 is a sectional view of an insulated wire covered with a sheet-metal armor consisting of a strip of sheet metal, the edges of which overlap, and which are secured together by solder or brazing. Fig. 3 is a sectional view of an insulated wire, showing the so as to produce theform shown in Fig.3. Fig..

5 is a top view of the machine in which the wire is covered and rolled on a drum. Fig. 6 is a sectionalview of the machine,showing the drum from which the metal strip is delivered, 3 5 the wiredrum, the course of the wire through the machine, and the receiving-drum. .Fig. 7 is an enlarged sectional view of the windingdrum, and Fig. 8 is an enlarged view of the brazing-block. a In the drawings, A is the drum from which the wire is delivered; B, the drum from which the strip of metal is delivered.

a is the insulated wire, and b the coveringstrip. This strip is usually a narrow strip of 4 5 copper, brass, or other suitable metal wide enough to surround the insulated wire and lap over -the edges, so that the same may be brazed together. Alead orother soft-metal pipe may be used, which, when slit open, will receive the wire, and when reclosed will have sufficient lap to be soldered or brazed.

O is a vessel in which heated tin or similar metal, or a composition of metals, is kept hot, and through whichthe sheet or armoris passed,

so as to cover the same with tin, suitable rolls 55.

being provided to guide its course through the tin bath. From the bath the strip 1) enters one or more dies D, and the wire a also enters the dies. The strip is here bent around the insulated wire and covers the same closely, as is shown in Fig. 3. One edge, however, is raised suffioientlyto allow fiuxing material to be placed on the same by the receptacle E. The wire now passes to the soldering or brazing dies F F, one above the other, both being heated preferably by the gas-jets f f, where the raised edge of the armor is pressed over the other edge of the same strip and firmly united by the heat of the brazing-dies. The covered wire is now passed through the dies G, where it is rounded, as shown in Fig. 2, or, if more than. one wire is inserted, as shown in Fig: 1. It may now, by being passed through a bath of molten tin, (indicated at 11,) be covered with tin or any other metal or material, to protect it be- 7 5 fore itis wound on the receiving-drum I, which may be constructed, as shown in Fig. 7, so as to be driven by frictional contact; or it may be made to revolve horizontally, like the ordinary draw-drum in wire-drawing machines. This machine may be operated by means of a belt, k, driving the shaft k, and connected by means of the beveled gears t l with the various parts, or it maybe driven in anyother manner. The heat used is preferably produced by burning 8 gas on the principle of the blow-pipe, and for that purpose the gassupply pipes m m and the pipes n n, supplying air under pressure, are united in the several burners. The wire or cable, when covered with this sheet armor formed of a narrow strip of sheet metal and thoroughly brazed, can be reeled ,on a reel and paid out as well as any other insulated wire, as it is more flexible than wire would be of a corresponding diameter.

The insulating material may be composed of matter not affected by heat in the process of brazing or soldering, and thus a durable inca'sed insulated wire or cable produced atsmall cost-and rapidly.

The incased wire may be used for telegraphic purposes and is particularly valuable for telephone use, as by means of the inner wire and the metallic armor a metallic circuit can be readily established and induction diminished or entirely prevented.

I do not broadly claim covering insulated wire by a sheet-metal armor, as I am aware that this is not new but by lapping the sheet longitudinally and brazing or soldering the samegreat strength is seeured,and the insulating material is better protected than in armor as heretofore niade.

Having thus described myinvention, I claim as new and desire to secure byLetters Patent- 1. In a machine for covering wire or cable, the combination of the following instrumentalities: a die constructed to form the strip of sheet metal around the wire or cable so as to lap over at the edges,adevice for soldering or brazing the. wire, and a drum or barrel to receive the wire, as described.

WILLIAM HALKYARD.

Witnesses HENRY J. MILLER, J. A. MILLER, JR. 

